Understanding the dynamics of tyre pressure isn’t difficult as long as you can gauge the ideal pressure for various situations. One of the biggest challenges for agricultural vehicles is understanding the variations in load on tyres when driving on different terrains.
The standard tyres have the ideal balance between air pressure, load per tyre in kg and speed in km/h. It is referred to as a three-way relationship that ensures ease of use. If any of these three factors are altered, the adjustment becomes essential. For example, if the maximum speed increases while the load remains unchanged, the tyre pressure needs to be changed. If this sounds confusing, you can always get in touch with us for personalised advice.
Minimise Wear and Tear on Agricultural Tyres
To prevent wear and tear on the casing and profile, it is important to have the right tyre pressure, both on and off the road. When driving an agricultural vehicle at high speed with low tyre pressure, it results in tyres with excessive flexures. It causes the excessive load to shift on the tyre’s edge due to excessive tyre pressure flexure results in. When driving on the fields, inappropriate tyre pressure can cause folds in the casing and agricultural tyres to circle the rim. In due course, it would result in heavy damage to the tyre and make it less efficient but may impact its lifespan.
Narrow Rim Option
In agricultural tyres, the IF and VF are mounted on a much wider rim than the usual standard tyres. It helps increase the air volume while maintaining the tyre’s stability. If the tyres with Narrow Rim Options are manufactured, they would be mounted on a rim narrower than what’s ideally recommended. It helps make the transition from standard tyres to the other variants like VF and IF tyres. It would improve efficiency while reducing cost drastically. However, it is to be noted that the Narrow-Rim Option is not available in all brands or sizes. The tyre pressure must always be higher for more stability than what is typically used for VF or IF tyres.
Agricultural Tyre’s Pressure Control System
The tyre inflation system is meant to increase the tyre’s potential greatly. The pressure can be increased when on the road and lowered as you enter the field. It helps in providing increased protection to the soil by enhancing the contact surface. This system is mainly meant for bigger and heavier self-driving harvesting machines, trailers, heavy tractors, fertilisers tractors, etc., that perform a lot of work on and off the field.
Fuel consumption depends heavily on tyre pressure. The tyre inflation system helps lower fuel consumption in the range of 7 to 10 per cent when driving on the field. When on the road, the savings on fuel depends primarily on the situation. With a trailer, the savings are around 17 per cent. For a tractor, it is about 5 per cent, and with more equipment, fuel savings revolve around 12 per cent. The Tyre inflation system also helps protect the tyre and reduce normal wear and tear by around 30 per cent.
Tyre Pressure Issues
The best way to explain the common problems with tyre pressure in the agricultural sector is by example. It is mainly because it depends on situations that vary greatly. Examples can help with identifying common tyre pressure problems and their subsequent solutions.
Practical Tyre Pressure in Agricultural Vehicles
What is connected to the tractor plays a major role as far as tyre pressure is concerned. It is because when the vehicle is connected to an external source is when its load changes drastically. At times, the extra weight acts as a lever even when weights are used to prevent it.
Centre of Gravity
For example, when connecting a plough with the agricultural vehicle, its operational and vertical position is different when driving. The change in speed between these two positions plays a crucial role. As the centre of gravity changes, the tractor tilts backwards because the rear axle gets heavier than the front axle. It negatively impacts safety and driveability.
Option in Agricultural Vehicles for Tyre Pressure
No matter which type of vehicle you drive, the tyre pressure must always be optimally adjusted for maximum load. In the situation mentioned above, the pressure must be doubled on average. However, this isn’t an optimal solution when the vehicle is driven on fields. It is why tyre pressure must always be changed depending on speed and terrain type. If this is not possible, choosing the tyres with larger air-chambers and the equivalent rolling circumference is advised.
Wheel Speed and Load
Wheel load is determined by tyre pressure and can be calculated by weighing or operating speed. It can be calculated on paper as well. The optimal pressure can be determined using the tables provided by the tyre manufacturer. However, make sure to use the table provided by the same brand’s tyre manufacturer as there might be differences even in the same tyres manufactured by different brands. If you’re confused about which tyre to choose, we can help you guide you in the right direction.
If you are looking for some expert advice on choosing the right tractor tyre or want to know more about tyre pressure dynamics, give us a call today! 01234 910510.